Trapdoor for storage and delivery apparatus



July l0, 1923. 1,461,411v L. CHARLER l TRAPDooR FOR sToAGE AND DELIVERY APPARATUS Filed June 2'7. 1921 trical means.

Patented July 10, $23.

l .tours du'AnieneitgfofrfTulanerE-sUn-Minisn,denndruivr;A4

' u TaArnoon roufsjroaaeu AND :DELIVERY ArrAaA'rUsI` Y s .'-Application fi1ed June 27,14

To all whom t may concer/n.7, v

Be it known that. I, LouisCHAnLmn, al subject of the King of Belgium, and resident of Jemeppe-sur-Meuse, Belgium, have. .invented certain new and usefulnImprovements Relating to TrapdoorsV forv Sto-rage and Delivery Apparatus; andI do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying draw#v ings, and to letters or figures of reference marked therein, which form a part of thisk specification. r

This invention relates to trap doors for storage and delivery apparatus such as in# stallations comprising bins, in which ores are stored, such bins being provided with trap doors to run the contents of the bins into the conveying apparatus. These doors should, in particular have the following properties:

l. They must be very durable.

2. They must be water-tight. v

3. They must have very large openings to allow ofthe passage of large lumps of materia-l.

4. They must not require a great effort to work them either by hand or mechanically.

5. They must have a; great delivering capacity regulatable at will.

6. They Vmust have a minimum bulk.

The present invention provides atype of trap door which perfectly fulfills allpractically required conditions. w

According to the present 'invention the trap door comprises a metal frame having a metal cover which under the `action of a counterweight, spring or other suitable device Vshuts the frame and opens the same by the aid of fluid under pressure er by elec- The trap door can b e made to assume a position of rest in anyposition so as to regulate the size of the orifice accordingly. This trap door is of course applicable toall kinds of material such as coa. sand, ore, schist, coke etc. 'y In the accompanying drawingone 'embodiment of the invention is shown by way of example. lf a is a metal frame of cast iron, sheet iron, cast steel or the like of great thickne ss,.and composed of several movable parts forming the spout through which the materials in the bin pass. This frame is provided-with two 1921.- 'serial 1ra-1.480379.. i i. i'

for oscillation.

pivots fb' onwh'ch theitrap pr0'per. .'13;. swings, the said' trap l being formed` of ;a centered wall to which two side walls yare f fixed at a right angle supporting the pivots* It is to be noted, in particular, that the i trap T act-s on the natural incline of the maf terial to be removed. There cannot therefore be breakage or wedging or obstruction,' or imperfectzshuttlng by interventionofbig;

lumps, etc.v I

To open the trap, compressedair, steam orv r" other fluid isv admitted, by means of a `suit#` n 1 v y I able distributing device, beneatha piston I? movable in a cylinder C2 Thus the rod 6 and thel counterweight Q are raised and the rod B is lowg ered, thus opening the trap. 'y As soon as the admission of compressed air is stopped the trap.'immediatelybe-comes 7; I

stationary and remains open in the corresponding position.

To shut the trap, operated to prevent the admission of compressed air and allow the escape of the air the distributor D is y located under the piston. `The .counter- Y weight Q the function of which maybe performed by the piston itself then draws the trap back to the shut position.`

In the case of a double-acting cylinder the distributor D after having allowed the compressed air at the lower part Vof the cylinder to escape will admit compressed air to the' upper surface of vthe piston, and this will make the trap shut quicker.l

Thus the trap may have any opening from f maximum to minimum and this openingjis ref ulatablel as required.

R represents diagrammatically a.y s`ource of compressed air.

, In conclusion, the invention embodies a trap mechanicallyy controlled essentially practical and easy.

The foregoing description is that of one constructional form of the invention.

As previously stated instead of compressed air any other Huid canV be employed for eX- lample water under pressure or steam. It

can also be replacedby an electro-magnet 0rany electric motor.

The control of a number of traps can be y singly or ina group yof two or more traps. This controlv can also lbe operated 'by travelling mechanism or mechanisms mov-A ing opposite the trap ortraps to be worked.

Finally the controlling.mechanismy of the traps can be mounted upona truck carrying the'ifeceptacle or receptacles toi loe filled, the

latterl arrangement presenting the great advantage of allowingthe vtruck conductor to do all the Work.

What I claim `is: y

l. A closure device comprising, a pivoted closure hood, a oonnterweight lnormally biasing the liood to closed position, a motor for moving the hood to open position, and a beam carrying said count-erweight and operatively connecting .the hood .and the motor.

2. A device according to claim l, said motor having a vertical piston member to 15 which said' beam is connected.

In testimony whereof liaiix my signature in presence of two Witnesses.

' y.LOUIS CHARLIER.

Witnesses: l

GEORGES VANDER HAEGHEN, CHARLES ',MERQHIE. 

